1 Reply Latest reply on Jul 2, 2015 7:48 AM by user_14586677

    Problem of pick up

    user_94391782

      I am using PSoC CY8C001 kit for counting pulses in window 1V to 2.5V. When the pin is ground it dsnt pik up..but when left stray counts go beyond 20000! what could be the issue?

         

      i have changed many pins and checked, even decreased and increased time of counting.

        • 1. Re: Problem of pick up
          user_14586677

          The input Z of an analog input is very high, therefore when left

             

          floating very susceptable to picking up noise, power line induced

             

          frequency, etc.. via start C coupling to pin.

             

           

             

          Either terminate with a R to lower input Z when not connected to

             

          anything, or ground input to comparators with a mux.

             

           

             

          Regards, Dana.